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Defect characterization using an ultrasonic array to measure the scattering coefficient matrix

Structural-integrity assessments of safety-critical components require accurate sizing of small defects. Paper shows how defects smaller than ultrasonic wavelength (i.e. below diffraction limit) can be reliably sized. Work led to research projects funded by EPSRC (EP/J016438/1, £308k plus £90k from Rolls-Royce plc., BAE Systems, Sellafield, EDF and Serco, 2013-6) and BAE Systems (contact: NDE Manager, £442k, 2011-4). Argentinian pipe-manufacturer Tenaris seconded employee to Bristol to learn about techniques [contact: Head of Applied Physics Department]. One of key papers leading to Wilcox's plenary at 2012 Quantitative NDE conference (Denver, USA) [tinyurl.com/gen-eng-137] and identified as research group highlight in REF5.